ECO Challenge
Airman 1st Class Devon Sheehan, 3rd Maintenance Squadron, finishes the four-mile hike carrying a 35 pound backpack as part of the EcoChallenge at Hillberg Ski Area. Teams and individuals completed a 4.4-mile run, nine-mile bicycle course, a half-mile kayak, then a four-mile hike with a pack. (U.S. Air Force photo/Steve White)